import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
  {path:'/',redirect:'/login'},
  {path:'/login',component:Login},
  {path:'/home',component:Home},
]

const router = new VueRouter({
  routes
})

//路由导航守卫
router.beforeEach((to,from,next)=>{
  // to 将要访问的路径
  // from 从何而来
  // next 是一个表示放行的函数
  if(to.path==='/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router
